CVE-2021-34343

MEDIUM

QNAP QTS < 4.3.3.1693, QuTS hero < h4.5.4.1771, QuTScloud < c4.5.6.1755 - RCE via Stack Buffer Overflow

Title source: llm
STIX 2.1

Description

A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS, QuTScloud, QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QTS, QuTScloud, QuTS hero: QTS 4.5.4.1715 build 20210630 and later QTS 5.0.0.1716 build 20210701 and later QuTScloud c4.5.6.1755 and later QuTS hero h4.5.4.1771 build 20210825 and later

References (1)

Core 1
Core References
Vendor Advisory x_refsource_misc
https://www.qnap.com/en/security-advisory/qsa-21-33

Scores

CVSS v3 6.0
EPSS 0.0048
EPSS Percentile 65.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H

Details

CWE
CWE-787
Status published
Products (3)
qnap/qts < 4.3.3.1693
qnap/quts_hero < h4.5.4.1771
qnap/qutscloud < c4.5.6.1755
Published Sep 10, 2021
Tracked Since Feb 18, 2026